It’s been less than two years since Rwandan-Scottish actor Ncuti Gatwa was confirmed as the 15th Doctor Who - but rumours are rife that he’s set to quit the role.
His second season as the Doctor is set to come to a conclusion later this year, with no third season yet confirmed by Disney and the BBC, who co-own the frachaise.
Speculation has been growing as to who might take over the TARDIS in one of the biggest roles in British television.
Here are the 13 favourites, according to betideas.com.
9. Richard Madden
'Game of Thrones' star Richard Madden is another actor who has been tipped to play both James Bond and Doctor Who. Other lead roles have included 'Bodyguard' and 'Citadel'. He's also 16/1 to become more familiar with a sonic screwdriver. | Getty Images
10. Jamie Bell
Rising to fame as a youngster playing the title role in 'Billy Elliot', Jamie Bell has gone on to star in a succession of big films, including 'The Adventures of Tintin', 'Fantastic Four', 'King Kong' and 'Film Stars Don't Die in Liverpool'. He's 18/1 to be tempted back to the small screen for Doctor Who. | Getty Images for IMDb
11. Will Poulter
About to hit the big screen in horror comedy 'Death of a Unicorn', Will Poulter is another former child star tipped to take over the lead role in the time travel sci-fi - starring in 2007's 'Son of Rambow'. The winner of the BAFTA Rising Star Award in 2014 is priced at 18/1. | Getty Images
12. Callum Turner
BAFTA-nominated actor - and former model - Callum Turner is 20/1 to be the latest regeneration. He's previously starred in the 'Fantastic Beasts' series of films, 'The Boys in the Boat' and miniseries 'Masters of the Air'. | Getty Images